Semiconductor laser device and optical pickup device

Details Semiconductor laser device and optical pickup device Semiconductor laser device and optical pickup device

2006-11-14

2006-11-14

Wong, Don (Department: 2163)

Coherent light generators

Particular resonant cavity

Specified cavity component

C369S109010

Reexamination Certificate

active

07136409

ABSTRACT:
In this semiconductor laser device, a polarization hologram transmits an outgoing beam directed from a semiconductor laser chip to an optical disk as a forward beam without diffracting the beam, and diffracts a backward beam of the laser beam, which is a return beam of the forward beam that has been reflected by the optical disk, so that the backward beam is deflected from a direction directed toward the semiconductor laser chip part and further directed toward first, second photoreception parts. Therefore, optical loss on the forward way from the semiconductor laser chip to the optical disk can be reduced, and return light to the semiconductor laser chip can be suppressed, so that a high-power, high-sensitivity semiconductor laser device can be realized.

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Chinese Office Action mailed Jul. 8, 2005 (w/English Translation thereof).

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